Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Ensemble Data Assimilation at 2021-11-24 00:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6735, expected range: 0.5289 0.5886
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.9195, expected range: 0.4538 0.6199
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6596, expected range: 0.5436 0.5985
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6703, expected range: 0.5223 0.5871
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7048, expected range: 0.5080 0.5903
Severely_persistent: stdev_norm_fgdepar=0.8729, expected range: 0.4502 0.6113
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6506, expected range: 0.4985 0.5435
Severely_persistent: stdev_norm_fgdepar=0.6942, expected range: 0.4349 0.5472
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6963, expected range: 0.4840 0.5504
Severely_persistent: stdev_norm_fgdepar=0.9279, expected range: 0.4342 0.5580
NOAA 18 AMSUA ALL SKY RADIANCES (5 channels affected) : out of range
Severe: stdev_norm_fgdepar=0.9059, expected range: 0.4505 0.6098
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 5 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.9730, expected range: 0.7304 0.8873
iasi
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1377, expected range: 0.0797 0.1101
METOP-B IASI RADIANCES CHANNEL 5401 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3418, expected range: 0.2121 0.2807
METOP-C IASI RADIANCES CHANNEL 128 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2347, expected range: 0.2569 0.2776
METOP-C IASI RADIANCES CHANNEL 148 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2126, expected range: 0.2288 0.2470
METOP-C IASI RADIANCES CHANNEL 5403 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3944, expected range: 0.2286 0.3206
METOP-B IASI RADIANCES (33 channels affected) : out of range
Severe: obs_number=1026.0000, expected range: 324.3800 502.1499
METOP-C IASI RADIANCES (35 channels affected) : out of range
Considerable: stdev_fgdepar=0.3019, expected range: 0.3219 0.3549
METOP-C IASI RADIANCES CHANNEL 314 : out of range
Considerable: avg_fgdepar=-0.0435, expected range: -0.0203 0.0252
METOP-C IASI RADIANCES (25 channels affected) : out of range
Considerable: obs_number=1676.0000, expected range: 689.6716 1320.3284
METOP-B IASI RADIANCES CHANNEL 3165 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=1.3483, expected range: 1.2243 1.3059
METOP-B IASI RADIANCES CHANNEL 3244 : out of range
Slight: stdev_fgdepar=1.3796, expected range: 1.2361 1.3492
cris
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1770, expected range: -0.2300 -0.2076
Slight: obs_number=5616.0000, expected range: 5857.8449 6447.2600
NOAA20 CRIS RADIANCES CHANNEL 93 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0139, expected range: -0.0415 -0.0224
NOAA20 CRIS RADIANCES (33 channels affected) : out of range
Severe: stdev_fgdepar=0.2079, expected range: 0.1653 0.1836
NOAA20 CRIS RADIANCES CHANNEL 92 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_fgdepar=0.0143, expected range: -0.0374 -0.0074
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
4 times in the last 10 days for at least one item
Slight: obs_number=5703.0000, expected range: 5994.3853 6520.5784
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
4 times in the last 10 days for at least one item
Slight: obs_number=5748.0000, expected range: 6060.3421 6579.4792
NOAA20 CRIS RADIANCES CHANNEL 993 : out of range
4 times in the last 10 days for at least one item
Slight: obs_number=5862.0000, expected range: 6151.4626 6725.4065
NOAA20 CRIS RADIANCES CHANNEL 1005 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=6669.0000, expected range: 7068.0857 7717.6545
NOAA20 CRIS RADIANCES CHANNEL 1029 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=6498.0000, expected range: 6887.0788 7529.4571
NOAA20 CRIS RADIANCES CHANNEL 1061 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=6975.0000, expected range: 7411.8678 7918.5322
NOAA20 CRIS RADIANCES CHANNEL 1085 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=6851.0000, expected range: 7247.8970 7882.5030
airs
AQUA AIRS RADIANCES CHANNEL 110 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0556, expected range: -0.0420 -0.0239
AQUA AIRS RADIANCES CHANNEL 21 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2156, expected range: -0.0340 0.0688
AQUA AIRS RADIANCES (18 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.6817, expected range: 0.8528 0.8969
AQUA AIRS RADIANCES CHANNEL 139 : out of range
3 times in the last 10 days for at least one item
Severe: avg_fgdepar=0.1326, expected range: -0.0894 0.0174
AQUA AIRS RADIANCES CHANNEL 1048 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.1154, expected range: -0.1465 -0.1262
AQUA AIRS RADIANCES CHANNEL 257 : out of range
Slight: avg_fgdepar=-0.0208, expected range: -0.0087 0.0359
AQUA AIRS RADIANCES CHANNEL 272 : out of range
Slight: stdev_fgdepar=0.3286, expected range: 0.2720 0.3113
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=41754.0000, expected range: 43377.0744 49739.4256
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=23202.0000, expected range: 26082.6577 29483.2173
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5729, expected range: 0.3971 0.4915
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3185, expected range: 0.2516 0.2813
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5363, expected range: 0.3574 0.4529
NPP ATMS RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.3503, expected range: 0.3019 0.3239
NPP ATMS RADIANCES CHANNEL 6 : out of range
3 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.1026, expected range: -0.0645 0.0393
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-60 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=719.0000, expected range: 152.3005 502.1788
amdar
All TAMDAR TEMPERATURE (K) ALL LAYERS Alantic Tropical are : all data missing
Severe: obs_number=0, expected range: 0.00 298.69